Vito Acconci’s Island in the Mur defies definition. A convoluted mass of steel and glass connected to the banks of the Mur River traversing the city of Graz, Austria, the island houses an amphitheater, cafe, and playground, all of which flow into one another. Acconci is quick to point out his design’s metamorphic qualities: “The functions are mixed, there’s no hierarchy, no boundaries, no separation between inside and outside.”